Lubricator.



No. 666,263. Patented Ian. 22, I901. M. F. COX.

LUBRICATOR.

(Applicsflion filed July 20, 1599.)

(No Model.)

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UNITED rates ATENT MILLARD F. COX, OF RICHMOND, VIRGINIA.

L U B R I CATO R SPECIFICATION forming part of Letters Patent NO.666,263, dated January 22, 1901.

Application filed July 20, 1899. Serial No. 724,570. (No model.

To all whom it may concern:

Be it known that I, MILLARD F. 00X, a citizen of the United States ofAmerica, and a resident of Richmond city, in the State of Virginia, haveinvented certain new and useful Improvements in Lubricators, of whichthe following is a specification.

My invention relates to lubricators for stationary and moving machinery;and its ob' jectis to provide a lubricator which shall not only admit ofthe filling of the cup with oil without removing any part, but whichshall at the same time be dust-proof.

The great objection to all lubricators which are constructed on theoil-valve principle is that they are not dust-proof and, in fact, inmany cases form veritable dust-traps. The dust and fine cinder which arecollected in such lubricators find their way with the oil to thebearings, which in a Very short time become badly cut. This isespecially so in the case of lubricators on the main rods, side rods,and cross-heads of locomotives. This objection my improved lubricatorentirely overcomes, since it provides a flush surface, formed by theupper faces of the oil-valve and its seat, from which any dust that mayhave accumulated may be completely wiped before oiling, and it alsoprovides a strainer or filter so arranged as to arrest any particles ofdust or grit that may be present in the oil.

My invention will be more readily understood by referring to thedrawings which ac company and form a part of this specification.

In the drawings, Figure I is a section through a lubricator of the kindin common use on locomotive main and side rods and showing my improvedfilling device. Fig. II is a section through a different form oflubricator such as is used on cross-heads and in other cramped positionsand also showing my improved filling device.

In Figs. I and II the lubricator is shown as consisting of two mainportions-namely, the cup and the cap. This construction is preferred, asit admits of easier access to the interior for cleaning and also sincethe upper portion or cap, to which I prefer my improved filling deviceto be attached, can be fitted to existing lubricators.

In Fig. I, 1 is a part of a rod end. 2 is a part of the brass. 3 is thelubricator-cup,

and 4 the oil-plunger, which fits loosely in the spud 5, the bore ofwhich forms a passage for the oil from the lubricator-cup 3 to thebearing. 6 is the lubricator-cap,which may be attached to thelubricator-cup by means of the screw-thread '7 and which is providedwith the stop 8, which limits the vertical movement of the oil-plunger4, the upper part of the said stop being extended vertically and beingprovided with the bore 9 to form a guide for the stem 10 of theoil-valve 11. The upper surface of the cap 6 is provided with a neck 12,having an internal screwthread 13, which engages the externalscrewthread 14 on the oil-valve seat 15.

The oil-valve 11 is pressed into its seat by means of the spring 16, thelower end of which may be supported by a shoulder formed on the stop 8,the said oil-valve being so constructed that its upper face 17 shallform a continuous or flush surface with the upper face 18 of thevalve-seat 15. The oil-valve and its seat are preferably made ofhardened steel, and for this and other reasons the said seat ispreferably made separate from the lubricator-cap.

Extending from the stop 8 to the base-ring of the lubricator-cap thereis a plate 19, forming within the lubricator-cap the chamber 20 andhaving perforations 21 to allow the oil to pass from the chamber 20 tothe interior of the lubricator-cup 3.

It is sometimes considered desirable to so arrange the stop 8 that itmay be adjusted vertically in order to lengthen or shorten the throw ofthe oil-plunger 4. This adjustment is readily and simply attained byplacing annular liners or washer-sin thejoint 22, formed between the rimof the cap 6 and the upper surface of the cup 3.

When about to fill the lubricator-cup with oil, the oiler first wipesall dust or grit from the flush surface formed by'the upper faces of theoil-valve and its seat, and the wiping of these faces free from grit isimpossible where theydo not form a continuous and flush surface. Theoiler then depresses the oil-valve 11 and allows the oil to pass aroundthe said oil-valveinto the chamber 20, whence it escapes by theperforations 21 in the plate 19 into the lubricator-cup 3.

Now the oil used for lubrication frequently contains much dust andgritty matter, and. this dust and gritty matter would unless removedpass with the oil to the bearings. I therefore plaee'in the chamber 20some cotton or other suitable material, which acts as a filter andarrests any solid matter that may be contained in the oil. Thisfiltering material may be renewed from time to time as occasionrequires. An important and valuable feature of the chamber 20 is, as canbe readily seen from the drawings, thatits lower portion extends over acomparatively large area, thereby providing sufficient surface to allowof the rapid filtration of the oil.

In Fig. II, which shows a form of lubricator suitable for use oncross-heads and in cramped positions, 3 is the base, having a lowerthreaded portion 23, adapted to engage similar threads in that part ofthe machine to which it is intended that the lubricator shall beattached, and also having on its upper side the neck 24, passing throughwhich and the lower threaded part 23 is the bore 25, adapted to engagethe stem 10 of the oil-valve 11. The neck 24 is further recessed toreceive the lower end of the valve-spring 16. At the bottom of the neck24 is a small hole 26 to permit the flow of oil from the lubricatorthrough the bore 25 to the part to be lubricated. Engaging thescrew-thread 27 of the base 3 is the screw-thread on the lower extremityof the cap 6. Extending from the walls of the cap 6 and making a neatfit around the neck 24 is the strainer-plate 19, having perforations 21and forming above it the chamber 20, adapted to receive cotton or othersuitable filtering material. 11 is the oil-valve, its upper face 17forming a continuous surface with the upper face 18 of the valve-seat15.

Having now described my invention, what I claim, and desire to protectby United States Letters Patent, -is- 1. In a lubricator, thecombination of a lubricator-cup, a lubricator-cap, a valve-seatremovably attached to the lubricator-cap, a spring-controlled conicalvalve, the exposed faces of the valve-seat and of the valve togetherforming a plane surface when the valve is closed, and a strainerintegral with the hi bricator-cap, and forming with the said cap achamber adapted to contain filtering material, and having perforationsadapted to allow the filtered oil to pass from the said chamher to thelubricator-eup.

2. In a lubrieator, the combination of a Inbricator-cup, alubricator-cap, a valve-seat removably attached to the lubricator-cap, aspring-controlled conical valve, the exposed faces of the valve-seat andof the valve together forming a plane surface when the valve is closed,and a strainer integral with the lubricator-cap and forming with thesaid cap a chamber adapted to contain filtering material, and havingperforations adapted to allow the filtered oil to pass from the saidchamber to the lubricator-cup, and also having in its central part aprojection, the said projection being bored so as to receive and form aguide for the stem of the-valve.

3. In a lubricator, the combination of a lubricator-cup, alubricator-cap, a valve-seat removably attached to the lubricator-cap, aspring-controlled conical valve, the exposed faces of the valve-seat andof the valve to gether forming a plane surface when the valve is closed,a strainer integral with the lubricator-cap and forming with the saidcap a chamber adapted to contain filtering material, andhavingperforations adapted to allow the filtered oil to pass from thesaid chamber to the lubricator-cup, and also having in its central partan upwardly-extending projection bored so as to receive and form a guidefor the stem of the valve, and also having another projection extendingdownward to form a stop for the oil'plunger, an oil-plunger, and a spudbored so as to receive and form a guide for the stem of the oil-plungerand to provide a passage for the oil from the lubricator-cup to thebearing.

Signed by me at Richmond, Virginia, this 11th day of July, 1899.

MILLARD F. COX.

Vitnesses:

EUGENE JONES, O. H. FUNSTEN.

